levo

Data Handling, Statistics and Mathematical Skills

Mathematical requirements (Appendix A): Standard form and unit conversion

  • 3 things to know
  • Component 2

Overview

Recall questions on Standard form and unit conversion.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

In a sample of 300 participants, 45 met the criterion. Express this as a percentage.

Numbers

A group's mean recall rose from 12 words to 15 words. Calculate the percentage increase.

Numbers

A sample of 60 is to contain males and females in the ratio 3:2. How many of each are needed?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Express 0.0032 in standard form.

    Model answer

    It is 3.2 × 10⁻³.

  2. 2

    A value is recorded as 2.5 × 10⁻². Convert it to decimal form.

    Model answer

    It is 0.025.

  3. 3

    A mean reaction time is given as 0.42 s. Express it in milliseconds.

    Model answer

    It is 420 ms.

  4. 4

    In a sample of 300 participants, 45 met the criterion. Express this as a percentage.

    Model answer

    45 out of 300 is 15%.

  5. 5

    Express 17 out of 25 as a percentage.

    Model answer

    It is 68%.

  6. 6

    A group's mean recall rose from 12 words to 15 words. Calculate the percentage increase.

    Model answer

    The rise of 3 words on a starting value of 12 is an increase of 25%.

Other ways to work this

The same content, four other ways.

What is inside Levo

Six ways to work the same material.

1Closed book
2Open book
3Closed book

The 3-step method, run for you

Answer cold, learn it, then prove it stuck. Levo tracks the jump between your first attempt and your last.

Biological Approach
Psychodynamic Approach
Behaviourist Approach
Cognitive Approach

Cram a whole paper in one sitting

Sort every topic into what you know and what you do not, then drill only the weak ones.

Watson and Rayner.
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Blank Blitz makes facts automatic

Rapid timed gap-fills on the terms and numbers you need to recall without thinking.

AThe mean of condition A is 15.
BThe mean of condition B is 10.
CThe difference between them is 5.

Build It gets the exam shape right

Assemble a full-mark answer from its marking points, in the order an examiner wants them.

The range uses only the two extreme scores.
TrueFalse

Test It catches misconceptions

Spot the fault in a statement. The traps are the mistakes students actually make.

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Brain Breaks between sessions

Short focus games to reset attention, so the next set lands better than the last.

Every question in Data Handling, Statistics and Mathematical Skills, on a schedule.

Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.

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